UV radiationThe ultraviolet radiation (better known as UV-radiation) is a electromagnetic radiation with a wavelength between 100nm and 400nm. UV-radiation is not perceivable by human senses. Subdivision based on wavelength (DIN 5031, part 7)
The radiation spectrum can be affected due to the doping of the mercury radiators (mercury vapour medium pressure emitter) via indium, gallium, iron or lead. Mercury radiators are used in wood technology since the 1970s. Light emitting diodes are used as a further way of artificial radiation for surface coating of wood since the end of the 2000s. A wavelength of about 200nm to about 450nm is used for the hardening process (photopolymerisation) of varnish- , colour- and glue coats. Further radiation sources, e.g. excimer lamps, were progressively used in the area of surface hardening via UV-radiation.
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